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Showing posts with label class11-physics. Show all posts
Showing posts with label class11-physics. Show all posts

# JEE NEET PHYSICS MCQs (Set-5)

Topics Covered: Laws of Motion, Circular Motion

Q1: In a tug-of-war match, one team is pulling with a force of 500 N. If they are exactly balanced by the other team, then the tension in the rope is?

(a) 0
(b) 250 N
(c) 500 N
(d) 1000 N

Q2: A particle of mass 0.3 kg is subjected to a force F = kx with k= 15 N/m. What will be its initial acceleration if it is released from a point 20 cm away from the origin.

(a) 3 m/s²
(b) 15 m/s²
(c) 5m/s²
(d) 10 m/s²  # JEE NEET PHYSICS MCQs (Set-4)

Topics Covered: Vector Algebra, Motion in a Plane

Q1: If θ is the angle between two vectors, then the resultant vector is maximum when the value of θ is

(a) 0°
(b) 90°
(c) 180°
(d) Same in all cases.

Q2: The change in a vector may occur due to

(a) Rotation of the frame of reference
(b) Translation of frame of reference
(c) Rotation of vector
(d) Both a and b

Q3: Acceleration of a particle under projectile motion at the highest point of its trajectory is :

(a) g
(b) zero
(c) less than g
(d) dependent upon projection velocity  ## PHYSICS MCQs (Set-3)

FOR JEE NEET Med/Engineering Entrance Examinations

Topics Covered: Kinematics (Motion in a Straight Line)

Q1: A particle starts from rest with uniform acceleration 'a' Its velocity after 'n' second is 'v'. The displacement in last two seconds is:

(a) 2v(n-1)/n
(b) v(n-1)/n
(c) v(n+1)/n
(d) 2v(2n+1)/n

Q2: A body starts from origin and moves along x-axis such that at any instant velocity is v = 4t³ - 2t. The acceleration of the particle when is it is 2m away from the origin is:

(a) 14 m/s²
(b) 18 m/s²
(c) 22 m/s²
(d) 32 m/s²  ## JEE NEET PHYSICS MCQs (Set-2)

FOR NEET - IIT JEE and Other Engineering or premedical Entrance Examinations

Topics Covered: Units & Dimensions, Error in Measurement

Q1: Which of the following sets cannot enter into the list of fundamental quantities in any system of unit

(a) length, mass and velocity
(b) length, time and velocity
(c) mass, time and velocity
(d) length, time and mass

Q2: The base quantity among the following is:

(a) Speed
(b) Weight
(c) Length
(d) Area  ## PHYSICS MCQs  (SET-1)

FOR NEET - IIT JEE and Other Engineering or premedical Entrance Examinations

Q1: A neutron with velocity v strikes a stationary deuterium atom, its kinetic energy changes by a factor of

(a) 15/16
(b) 1/2
(c) 2/1
(d) 8/9

Q2: AM radio band has carrier frequency from 500 kHz to 1500 kHz. Assuming a fixed inductance in a simple LC circuit, what is  ratio of highest capacitance to lowest capacitance required to cover this frequency range?

(a) 3
(b) 6
(c) 9
(d) 12  ## Gravitation - Kepler's Laws Of Planetary Motion

Numerical Problems with Solutions

Question 1: The planet Neptune travels around the Sun with a period of 165 years. Show that radius of orbit is approximately 30 times that of the Earth's orbit, considering their orbits circular.

Let T₁ = T(earth) = 1 year
T₂ = T(Neptune) = 165 years  # Physics: Important Discoveries

No. Discovery Scientist Year
1. Proton Rutherford 1919
3. Atom John Dalton 1808
4. Atomic Structure Neil Bohr & Rutherford 1913
7. Raman Effect CV. Raman 1928
8. X-Rays Roentgen 1895
9. Photoelectric effect Albert Einstein 1905
10. Periodic table Mendeleev 1888
11. Nuclear Reactor Anrico Fermi 1942
12. Wireless Telegram Marconi 1901
13. Dynamite Alfred Nobel 1867  ## CBSE Class 11 - Physics Sample Question Paper - (2018-19)

Physics is a study of basic laws of nature and their manifestation in different natural phenomena. Physics is the study of physical world and matter and its motion through space and time, along with related concepts such as energy and force. The class 11 syllabus provides logical sequencing of the ‘Units’ of the subject matter with proper placement of concepts with their linkages for better understanding.

Here follows the class 11 Half Year Physics sample question paper to assess your knowledge.  ## Physics Quiz (1 Word Answer)

Q1: Who firstly demonstrated experimentally the existence of electromagnetic wave?

Q2: The working of the quartz crystal in the watch is based on which effect?

Q3: What is the unit of Radioactivity?

Q4: What is the wavelength of the visible spectrum?

Q5: One astronomical unit is the average distance between___?

Q6: Number of basic S.I. units are ___.

Q7: What is the name of the scientist who stated that matter can be converted into energy?

Q8: The size of the atomic nucleus is of the order of___?

Q9: A temperature at which both the Fahrenheit and the centigrade scales have the same value?  ## Class 11 - Physics - CHAPTER – 1 PHYSICAL WORLD (Q and A)

Q1: Who gave general theory of relativity?

Answer: Albert Einstein gave the general theory of relativity.

Q2: Is gravitational force is universal?

Answer: Yes, gravitational force is universal.

Q3: How a strong nuclear force is stronger comparing to electromagnetic force?

Answer: A strong nuclear force is 100 times stronger than the electromangnetic force in strength.  ## Class XI - PHYSICS - PROJECTILE MOTION - (Assignment) image credits: cmglee (Wikimedia)

1. An aeroplane is flying in horizontal direction with a velocity of 600 km/h and at a height of 1960 m. When it is vertically above the point A on the ground, a body is dropped from it. The body strikes the ground at a point B. Calculate distance AB.

2. A body is thrown horizontally from the top of a lower and strike the ground in 3 seconds at an angle 45° with the horizontal. Find the height of the lower and the speed with which it was projected.
[Answer:  44.1 m , 29.4 m/s ]

3. An air craft is flying at a height of 3,500 m above the ground. If the angle subtended at a ground observation point by the air craft positions 10 s apart is 30° while passing over his head, what is the speed of the air craft?  ## CENTRE OF MASS AND ROTATIONAL MOTION (ASSIGNMENT)

1. Two bodies of masses 0.5 kg and 1 kg are lying in XY plane at (-1,2) and (3,4) respectively. What are the co-ordinates of the centre of mass?

2. Three points masses of 1 kg, 2 kg and 3 kg lie a (1,2), (0,-1) and (2,-3) respectively. Calculate the co-ordinates of the centre of mass of the system.

3. Three identical spheres each of radius r, and mass m are placed touching each other on a horizontal floor. Locate the position of centre of mass of the system.

4. Two particles of mass 2 kg and 1 kg are moving along the same line with speeds 2m/s and 5m/s respectively. What is the speed of the centre of mass of the system. if both the particles are moving
(a) in same direction
(b) in opposite direction?

Answer: 3m/s, 1/3 m/s in the direction of 1 kg  ## Kepler's Laws

Class 11 - Physics - Gravitation

Kepler's Laws

There has always been a great interest in the motion of planets. Part of the reason is that some people believe that it changed the course of science and laid foundation to Newtonian Laws. By 16th century, a lot of data on the motion of planets had been collected by many astronomers. Based on that data Johannes Kepler, after a life time study, worked out three empirical laws which govern the motion of planets and are known as Kepler's laws of planetary motion.

The laws for planets orbiting the sun, they hold equally well for satellites, either natural or artificial, orbiting Earth or any other massive central body.

The three laws are:

The law of orbits
Law of areas
Law of periods  ## Understanding Mass and Weight

Physics - Gravitation

Mass and Weight
The quantity of matter in a body is known as mass of the body. Mass is quantitative measure of inertia. Mass is an intrinsic property of matter and does not change as an object is moved from one location to another. Weight, in contrast, is the gravitational force that earth exerts on the object and can vary, depending on how far the object is above the earth's surface or whether it is located near another body such as the moon. The relation between weight W and mass m can be written in one of two ways:

W = GMₑm / r²
W = mg

According to the Newton's second law,
Force = mass ✕ acceleration

or mass = force / acceleration

Mass is of two types :
i) Inertial mass

ii) Gravitational mass

1. Inertial Mass:
Ratio of the applied external force and the acceleration produced in the body is known as inertial mass,

mi = External force applied / Acceleration produced.  ## WORK ENERGY POWER (Assignment-1)

Q1. A water pump lifts water from a level 10 m below the ground. Water is pumped at a rate of 30
kg/minute with negligible velocity. Calculate the minimum horse power the engine should have to
do this?

Q2. A man weighs 60 kg. Calculate work done by gravity as he climbs a ladder of heights 5m.

Q3. A body of mass 0.3 kg is taken up an inclined plane of length 10 m and height 5 m, and then allowed
to slide down to the bottom again. The coefficient of friction between the body and the plane is 0.15
What is the
(a) Work done by the gravitational force over the round trip?
(b) Work done by the applied force on the upward journey?
(c) Work done by the frictional force over the round trip
(d) Kinetic energy of the body at the end of the trip?

Answer: zero, 18.5 J, -7.6J, 10.9J

Q4. A pump can throw up 10 quintals of coal per hour from a coal mine 120 m deep. Calculate the power of the engine in watt assuming that efficiency is 80%.  ## Physics -Syllabus (2017-18)

### CBSE Class 11

Here presents the prescribed syllabus for Class 11 Physics for the curriculum 2017-18.  ## Laws of Motion

Chapter Revision Test

Q1:  A person jumps from the roof of a house with a box of weight W on his head. What will be the weight of the box as experienced by the person during jump? 

Q2: Which of the following is scalar quantity? Inertia, force and linear momentum. 

Q3: Action and reaction forces do not balance each other. Why?  ## Motion in Straight Line

Chapter Revision Test

Q1. A railway train 400m long is going from New Delhi railway station to Kanpur. 
Can we consider railway train as a point object?

Q2. Shipra went from her home to school 2.5km away. On finding her home closed she 
returned to her home immediately. What is her net displacement? What is the total
distance covered by her?

Q3. Can speed of an object be negative? Justify  ## Work, Energy and Power

CHAPTER REVISION TEST
CLASS XI - PHYSICS

Q1: When an air bubble rises in water, what happens to its potential energy? 

Q2: A spring is cut into two equal halves. How is the spring constant of each half affected? 

Q3: What should be the angle between the force and the displacement for maximum and minimum work? 

Q4: The momentum of an object is doubled. How does it’s. K.E. change? 

Q5: What is work done in holding a 15kg suitcase while waiting for a bus for 15 minutes?  ## Friday, 3 August 2012

### CBSE Class 9 and Class 11 to have PSA test from SA-II onwards

CBSE has asked CBSE affiliated schools to conduct a MCQ based exam called Problem Solving Assessment (CBSE-PSA) for class IX and XI from second term (SA-2) w.e.f. from January-Feburary 2013.
Later the test will be conducted for class X also.

Its score will be added in FA-4 which is 10% of total assessments of Class IX and class XI students will get a certificate.  